SIST EN IEC 62271-212:2022
(Main)High-voltage switchgear and controlgear - Part 212: Compact Equipment Assembly for Distribution Substation (CEADS) for AC voltages up to 52 kV (IEC 62271-212:2022)
High-voltage switchgear and controlgear - Part 212: Compact Equipment Assembly for Distribution Substation (CEADS) for AC voltages up to 52 kV (IEC 62271-212:2022)
IEC 62271-212:2022 is available as IEC 62271-212:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 62271-212;2022 specifies the service conditions, rated characteristics, general structural requirements and test methods of the assemblies of the main electrical functional units of a high-voltage transformer substation, duly interconnected, for AC voltages up to and including 52 kV on the high-voltage side and service frequency 50 Hz or 60 Hz. The CEADS is cable‑connected to the high-voltage network for indoor and outdoor applications of restricted access. This second edition cancels and replaces the first edition published in 2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- clause numbering aligned with IEC 62271-1:2017,
- rewording of title and scope of the document,
- implement changes on internal arc definition and testing following the evolution of prefabricated substation concept according to IEC 62271-202,
- general review of main test procedures such as temperature rise or dielectric test on interconnections, considering control equipment, communication, smart grid devices and integration of components,
- general review of installation, operation, safety and maintenance requirements.
Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 212: Kompakte Gerätekombinationen für Verteilstationen (CEADS) (IEC 62271-212:2022)
Appareillage à haute tension - Partie 212: Ensemble compact d’équipement pour poste de distribution (ECEPD) pour les tensions alternatives inférieures ou égales à 52 kV (IEC 62271-212:2022)
IEC 62271-212:2022 est disponible sous forme de IEC 62271-212:2022 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 62271-212:2022 spécifie les conditions de service, les caractéristiques assignées, les exigences structurelles générales et les méthodes d'essai des ensembles des principales unités fonctionnelles électriques d'un poste de transformation haute tension, dûment interconnecté, pour les tensions alternatives inférieures ou égales à 52 kV du côté haute tension, et avec une fréquence de service de 50 Hz ou 60 Hz. L’ECEPD est raccordé par câble au réseau à haute tension pour des applications à l’intérieur et à l’extérieur à accès restreint. Cette deuxième édition annule et remplace la première édition parue en 2016. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- numérotation des articles alignée sur l’IEC 62271-1:2017;
- reformulation du titre et du domaine d'application du document;
- mise en œuvre des modifications relatives à la définition et aux essais d'arc interne en suivant l'évolution du concept de poste préfabriqué conformément à l’IEC 62271-202;
- examen général des principaux modes opératoires d'essai tels que l'échauffement ou l’essai diélectrique sur les interconnexions, compte tenu des équipements de commande, de la communication, des dispositifs de réseau intelligent et de l'intégration des composants;
- examen général des exigences d’installation, de fonctionnement, de sécurité et de maintenance.
Visokonapetostne stikalne in krmilne naprave - 212. del: Kompaktni sestavi opreme za distribucijske postaje (CEADS) za napetosti AC do 52 kV (IEC 62271-212:2022)
Ta del standarda IEC 62271 določa pogoje delovanja, naznačene karakteristike, splošne strukturne zahteve in preskusne metode ustrezno medsebojno povezanih sestavov glavnih električnih funkcijskih enot visokonapetostne transformatorske postaje za izmenične napetosti do vključno 52 kV na strani z visoko napetostjo in za delovno frekvenco 50 Hz ali 60 Hz. Kompakten sestav opreme za distribucijske podpostaje je s kablom priključen na visokonapetostno omrežje za notranjo ali zunanjo uporabo z omejenim dostopom. Kompakten sestav opreme za distribucijske podpostaje, kot je opredeljeno v tem dokumentu, je zasnovan in preizkušen kot en izdelek z enotno serijsko številko ter enim naborom dokumentacije. Funkcije kompaktnih sestavov opreme za distribucijske podpostaje so: – pretvorba z visoke na visoko napetost ali z visoke na nizko napetost in nekatere ali vse spodnje funkcije: – preklop in krmiljene za delovanje visokonapetostnih tokokrogov; – preklop in krmiljenje za delovanje nizkonapetostnih tokokrogov; – zaščita funkcijske enote močnostnega transformatorja. Glavne funkcije opravljajo naslednje funkcijske enote: – visokonapetostna funkcijska enota; – funkcijska enota močnostnega transformatorja; – nizkonapetostna funkcijska enota. OPOMBA: Za namene tega dokumenta se samozaščiten transformator ne obravnava kot kompakten sestav opreme za distribucijske podpostaje, ampak kot funkcijska enota, zasnovana in tipsko preskušena v skladu z lastnim standardom IEC 60076-13:2006 za izdelke.
General Information
Relations
Overview
EN IEC 62271-212:2022 specifies requirements for the Compact Equipment Assembly for Distribution Substation (CEADS) used with AC voltages up to 52 kV (50 Hz or 60 Hz). Published as a CLC/CENELEC adoption of IEC 62271-212:2022, this second edition defines service conditions, rated characteristics, structural requirements and type test methods for fully interconnected high‑voltage transformer substation assemblies that are cable‑connected to the HV network and intended for indoor or outdoor restricted‑access installations.
This edition is a technical revision of the 2016 standard and includes updated clause numbering, reworded scope, revised internal arc definitions/testing consistent with prefabricated substation practice, and a general review of test procedures and installation, operation, safety and maintenance requirements.
Key Topics
- Scope and service conditions: normal and special environmental and operational conditions applicable to CEADS.
- Ratings and characteristics: rated voltage, insulation levels, rated continuous and short‑time currents, peak currents, auxiliary supplies and specified power/losses.
- Design and construction: requirements for liquids/gases, earthing, enclosures, degrees of protection (IP), creepage distances, tightness, fire hazard and flammability.
- Internal arc protection: definitions, classification (IAC) and verification tests aligned with prefabricated substation guidance.
- Type tests and test procedures: dielectric tests, temperature‑rise, short‑time and peak withstand current tests, internal arc tests, resistance and tightness tests, EMC, x‑radiation checks for vacuum interrupters, and verification of protection systems.
- Control, communications and smart‑grid readiness: revised consideration of control equipment, communications and integrated devices during dielectric and functional testing.
- Installation, operation and maintenance: updated operational safety, maintenance and environmental protection expectations.
Applications
EN IEC 62271-212:2022 is directly applicable to:
- Manufacturers of CEADS / prefabricated distribution substations
- Utility and distribution network engineers specifying compact substations up to 52 kV
- System integrators and EPC contractors deploying indoor/outdoor restricted‑access substations
- Type‑testing laboratories and conformity assessment bodies validating dielectric, mechanical and internal‑arc performance
- Asset owners managing installation, operation, safety and maintenance procedures for compact substations
Practical benefits include standardized safety and performance criteria, clearer test protocols for modern smart‑grid components, and harmonized internal‑arc protection practices to reduce risk in compact, enclosed installations.
Related Standards
- IEC/EN 62271-1 - Common specifications for AC switchgear and controlgear
- IEC/EN 62271-200 - Metal‑enclosed switchgear up to 52 kV
- IEC 62271-201 / 202 - Solid‑insulation enclosed switchgear and prefabricated substations
- IEC 60076 series - Power transformers (relevant for transformer aspects in CEADS)
Keywords: EN IEC 62271-212:2022, CEADS, compact equipment assembly, distribution substation, high‑voltage switchgear, 52 kV, internal arc, type tests, smart grid.
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2022
Nadomešča:
SIST EN 62271-212:2017
Visokonapetostne stikalne in krmilne naprave - 212. del: Kompaktni sestavi
opreme za distribucijske podpostaje (CEADS) za napetosti AC do 52 kV (IEC 62271
-212:2022)
High-voltage switchgear and controlgear - Part 212: Compact Equipment Assembly for
Distribution Substation (CEADS) for AC voltages up to 52 kV (IEC 62271-212:2022)
Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 212: Kompakte
Gerätekombinationen für Verteilstationen (CEADS) (IEC 62271-212:2022)
Appareillage à haute tension - Partie 212: Ensemble compact d’équipement pour poste
de distribution (ECEPD) pour les tensions alternatives inférieures ou égales à 52 kV (IEC
62271-212:2022)
Ta slovenski standard je istoveten z: EN IEC 62271-212:2022
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 62271-212
NORME EUROPÉENNE
EUROPÄISCHE NORM August 2022
ICS 29.130.10 Supersedes EN 62271-212:2017
English Version
High-voltage switchgear and controlgear - Part 212: Compact
Equipment Assembly for Distribution Substation (CEADS) for AC
voltages up to 52 kV
(IEC 62271-212:2022)
Appareillage à haute tension - Partie 212: Ensemble Hochspannungs-Schaltgeräte und -Schaltanlagen -
compact d'équipement pour poste de distribution (ECEPD) Teil 212: Kompakte Gerätekombinationen für
pour les tensions alternatives inférieures ou égales à 52 kV Verteilstationen (CEADS)
(IEC 62271-212:2022) (IEC 62271-212:2022)
This European Standard was approved by CENELEC on 2022-08-03. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62271-212:2022 E
European foreword
The text of document 17C/845/FDIS, future edition 2 of IEC 62271-212, prepared by SC 17C
"Assemblies" of IEC/TC 17 "High-voltage switchgear and controlgear" was submitted to the IEC-
CENELEC parallel vote and approved by CENELEC as EN IEC 62271-212:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-05-03
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-08-03
document have to be withdrawn
This document supersedes EN 62271-212:2017 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62271-212:2022 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60059:1999 NOTE Harmonized as EN 60059:1999 (not modified)
IEC 62271-4:2013 NOTE Harmonized as EN 62271-4:2013 (not modified)
IEC 61936-1:2021 NOTE Harmonized as EN IEC 61936-1:2021 (not modified)
IEC 62262:2002 NOTE Harmonized as EN 62262:2002 (not modified)
IEC/TR 62271-307:2015 NOTE Harmonized as CLC IEC/TR 62271-307:2019 (not modified)
IEC 60076-13:2006 NOTE Harmonized as EN 60076-13:2006 (not modified)
IEC/TR 62271-208:2009 NOTE Harmonized as CLC/TR 62271-208:2010 (not modified)
IEC 62271-200:2011 NOTE Harmonized as EN 62271-200:2012 (not modified)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-441 - International Electrotechnical Vocabulary. - -
Switchgear, controlgear and fuses
IEC 60050-461 - International Electrotechnical Vocabulary - - -
Part 461: Electric cables
IEC 60076 series Power transformers EN 60076 series
IEC 60076-1 2011 Power transformers - Part 1: General EN 60076-1 2011
IEC 60076-2 2011 Power transformers - Part 2: Temperature EN 60076-2 2011
rise for liquid-immersed transformers
IEC 60076-3 2013 Power transformers - Part 3: Insulation EN 60076-3 2013
levels, dielectric tests and external
clearances in air
+ A1 2018 + A1 2018
IEC 60076-5 2006 Power transformers - Part 5: Ability to EN 60076-5 2006
withstand short circuit
IEC 60076-7 2018 Power transformers - Part 7: Loading guide - -
for mineral-oil-immersed power
transformers
IEC 60076-10 2016 Power transformers - Part 10: EN 60076-10 2016
Determination of sound levels
IEC 60076-11 2018 Power transformers - Part 11: Dry-type EN IEC 60076-11 2018
transformers
IEC 60076-12 2008 Power transformers - Part 12: Loading - -
guide for dry-type power transformers
IEC 60076-15 2015 Power transformers - Part 15: Gas-filled - -
power transformers
IEC 60243-1 2013 Electric strength of insulating materials - EN 60243-1 2013
Test methods - Part 1: Tests at power
frequencies
Publication Year Title EN/HD Year
IEC 60364-4-41 2005 Low-voltage electrical installations -
(mod) Part 4-41: Protection for safety - Protection
against electric shock
+ A1 2017 HD 60364-4-41 2017
- - + A11 2017
- - + A12 2019
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code)
- - + corrigendum May 1993
+ A1 1999 + A1 2000
+ A2 2013 + A2 2013
IEC 60721-1 1990 Classification of environmental conditions - EN 60721-1 1995
Part 1: Environmental parameters and their
severities
+ A1 1992 - -
+ A2 1995 + A2 1995
IEC 60721-2-2 2012 Classification of environmental conditions - EN 60721-2-2 2013
Part 2-2: Environmental conditions
appearing in nature - Precipitation and
wind
IEC 60721-2-4 2018 Classification of environmental conditions - EN IEC 60721-2-4 2018
Part 2-4: Environmental conditions
appearing in nature - Solar radiation and
temperature
- - + AC 2018-
IEC/TS 60815 series Selection and dimensioning of high-voltage - series
insulators intended for use in polluted
conditions
IEC 60947-1 2020 Low-voltage switchgear and controlgear - EN IEC 60947-1 2021
Part 1: General rules
IEC 61439 series Low-voltage switchgear and controlgear EN IEC 61439 series
assemblies
IEC 61439-1 2020 Low-voltage switchgear and controlgear EN IEC 61439-1 2021
assemblies - Part 1: General rules
IEC 62271-1 2017 High-voltage switchgear and controlgear - EN 62271-1 2017
Part 1: Common specifications for
alternating current switchgear and
controlgear
IEC 62271-200 2021 High-voltage switchgear and controlgear - EN IEC 62271-200 2021
Part 200: AC metal-enclosed switchgear
and controlgear for rated voltages above 1
kV and up to and including 52 kV
This series supersedes some parts of IEC 60439 series.
Publication Year Title EN/HD Year
IEC 62271-201 2014 High-voltage switchgear and controlgear - EN 62271-201 2014
Part 201: AC solid-insulation enclosed
switchgear and controlgear for rated
voltages above 1 kV and up to and
including 52 kV
IEC 62271-202 2022 High-voltage switchgear and controlgear - - -
Part 202: AC prefabricated substations for
rated voltages above 1 kV and up to and
including 52 kV
IEC 62271-212 ®
Edition 2.0 2022-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –
Part 212: Compact Equipment Assembly for Distribution Substation (CEADS) for
AC voltages up to 52 kV
Appareillage à haute tension –
Partie 212: Ensemble compact d’équipement pour poste de distribution
(ECEPD) pour les tensions alternatives inférieures ou égales à 52 kV
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.10 ISBN 978-2-8322-3806-6
– 2 – IEC 62271-212:2022 © IEC 2022
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 11
3.1 General terms and definitions . 11
3.2 Assemblies of switchgear and controlgear . 11
3.3 Parts of assemblies . 12
3.4 Switching devices . 13
3.5 Parts of switchgear and controlgear . 13
3.6 Operational characteristics of switchgear and controlgear . 13
3.7 Characteristic quantities . 13
3.8 Index of definitions . 13
4 Normal and special service conditions . 13
4.1 Normal service conditions . 13
4.2 Special service conditions . 14
5 Ratings . 15
5.1 General . 15
5.2 Rated voltage . 16
5.3 Rated insulation level . 16
5.4 Rated frequency (f ) . 16
r
5.5 Rated continuous current (I ) . 16
r
5.6 Rated short-time withstand current (I ) . 17
k
5.7 Rated peak withstand current (I ) . 17
p
5.9 Rated supply voltage of auxiliary and control circuits (U ) . 18
a
5.10 Rated supply frequency of auxiliary and control circuits . 18
5.11 Rated pressure of compressed gas supply for controlled pressure systems . 18
5.101 Rated power and total losses of CEADS . 19
5.102 Ratings of the internal arc classification (IAC) . 19
6 Design and construction . 20
6.1 Requirements for liquids in switchgear and controlgear . 21
6.2 Requirements for gases in switchgear and controlgear . 21
6.3 Earthing of switchgear and controlgear . 21
6.4 Auxiliary and control equipment and circuits . 22
6.5 Dependent power operation . 22
6.6 Stored energy operation . 22
6.7 Independent unlatched operation (independent manual or power operation) . 22
6.8 Manually operated actuators . 22
6.9 Operation of releases . 22
6.10 Pressure/level indication . 22
6.11 Nameplates. 22
6.12 Locking devices . 23
6.13 Position indication . 23
6.14 Degrees of protection provided by enclosures . 23
6.15 Creepage distances for outdoor insulators . 24
IEC 62271-212:2022 © IEC 2022 – 3 –
6.16 Gas and vacuum tightness . 24
6.17 Tightness for liquid systems . 24
6.18 Fire hazard (flammability) . 24
6.19 Electromagnetic compatibility (EMC) . 24
6.20 X-ray emission . 24
6.21 Corrosion . 24
6.22 Filling levels for insulation, switching and/or operation . 24
6.101 Protection against mechanical stresses . 25
6.102 Protection of the environment due to internal defects . 25
6.103 Internal arc fault . 25
6.104 Enclosures . 26
6.105 Sound emission . 26
6.106 Electromagnetic fields . 26
6.107 Solar radiation . 26
7 Type tests . 27
7.1 General . 27
7.2 Dielectric tests . 28
7.3 Radio interference voltage (RIV) test . 32
7.4 Resistance measurement . 32
7.5 Continuous current tests . 32
7.6 Short-time withstand current and peak withstand current tests . 32
7.7 Verification of the protection . 33
7.8 Tightness tests . 33
7.9 Electromagnetic compatibility tests (EMC) . 33
7.10 Additional tests on auxiliary and control circuits . 34
7.11 X-radiation test for vacuum interrupters . 34
7.101 Temperature-rise tests . 35
7.102 Internal arc test . 42
7.103 Verification of making and breaking capacities of high-voltage functional unit . 45
7.104 Mechanical operation tests . 45
7.105 Mechanical stability test . 45
7.106 Pressure withstand test for gas-filled compartments. 45
7.107 Measurements of leakage currents of non-metallic enclosures . 46
7.108 Weatherproofing test . 46
7.109 Tightness and mechanical strength for liquid filled compartments . 46
7.110 Measurement or calculation of electromagnetic fields . 46
8 Routine tests . 46
8.1 General . 46
8.2 Dielectric tests on the main circuit . 47
8.3 Tests on auxiliary and control circuits . 48
8.4 Measurement of the resistance of the main circuit . 48
8.5 Tightness test . 48
8.6 Design and visual checks . 48
8.101 Mechanical operation tests on high-voltage functional unit . 48
8.102 Pressure tests of gas-filled compartments . 48
8.103 Tests of auxiliary electrical, pneumatic and hydraulic devices . 49
8.104 Measurement of the winding resistance . 49
8.105 Measurement of the voltage ratio and check of phase displacement . 49
8.106 Measurement of the short circuit impedance and load losses . 49
– 4 – IEC 62271-212:2022 © IEC 2022
8.107 Measurement of no-load loss and current . 49
8.108 Inspection of the low-voltage functional unit, including inspection of wiring,
operational performance and function . 49
8.109 Checking of protective measures and of the electrical continuity of the
protective circuits of the low-voltage functional unit . 49
8.110 Tests after CEADS assembly on site . 49
9 Guide to the selection of CEADS (informative) . 49
9.1 General . 49
9.2 Selection of rated values . 50
9.3 Cable-interface considerations . 50
9.4 Continuous or temporary overload due to changed service conditions . 50
9.5 Environmental aspects . 50
9.101 Selection of internal arc classification . 50
9.102 Summary of technical requirements and ratings for CEADS . 52
10 Information to be given with enquiries, tenders and orders (informative) . 56
10.1 General . 56
10.2 Information with enquiries and orders . 56
10.3 Information with tenders . 57
11 Transport, storage, installation, operating instructions and maintenance. 58
11.1 General . 58
11.2 Conditions during transport, storage and installation . 58
11.3 Installation . 58
11.4 Operating instructions . 59
11.5 Maintenance . 60
11.101 Dismantling, recycling and disposal at the end of service life . 60
12 Safety . 60
12.1 General . 60
12.101 Electrical aspects . 61
12.102 Mechanical aspects . 61
12.103 Thermal aspects . 61
12.104 Internal arc aspects . 61
13 Influence of the product on the environment . 61
Annex A (normative) Method for testing CEADS under conditions of arcing due to an
internal arc fault . 62
A.1 General . 62
A.2 Room simulation . 62
A.3 Indicators (for assessing the thermal effects of the gases) . 62
A.4 Tolerances for geometrical dimensions of test arrangements . 64
A.5 Test parameters . 64
A.6 Test procedure . 64
A.7 Designation of the internal arc classification . 66
Annex B (normative) Test to verify the sound level of a CEADS . 75
B.1 Purpose . 75
B.2 Test object . 75
B.3 Test method . 75
B.4 Measurements . 75
B.5 Presentation and calculation of the results . 75
Annex C (informative) Types and application of CEADS . 76
IEC 62271-212:2022 © IEC 2022 – 5 –
C.1 Type of CEADS . 76
C.2 Application of CEADS . 76
Bibliography . 79
Figure 1 – Test diagram in case of type-tested high-voltage functional unit . 37
Figure 2 – Test diagram in case of non-type-tested high-voltage functional unit . 38
Figure 3 – Diagram of the temperature-rise test alternative method . 39
Figure 4 – Diagram for the open-circuit test . 40
Figure A.1 – Mounting frame for vertical indicators . 67
Figure A.2 – Horizontal indicators . 67
Figure A.3 – Protection of operators in front of classified side(s) of CEADS . 68
Figure A.4 – Protection of general public around the CEADS . 68
Figure A.5 – Protection of operators in front of classified side(s) of CEADS having a
pressure relief volume below the floor . 69
Figure A.6 – Protection of the general public around the CEADS having a pressure
relief volume below the floor . 70
Figure A.7 – Selection of tests on high-voltage functional unit for class IAC-A . 71
Figure A.8 – Selection of tests on high-voltage functional unit for class IAC-B . 72
Figure A.9 – Selection of tests on high-voltage interconnection for class IAC-A . 73
Figure A.10 – Selection of tests on high-voltage interconnection for class IAC-B . 74
Figure C.1 – Application of CEADS . 77
Figure C.2 – CEADS Type G . 77
Figure C.3 – CEADS Type A . 78
Figure C.4 – CEADS Type I . 78
Table 1 – Locations, causes and examples of measures decreasing the probability of
internal arc faults . 51
Table 2 – Examples of measures limiting the consequences of internal arc faults . 51
Table 3 – Summary of technical requirements, ratings for CEADS – Service conditions . 53
Table 4 – Summary of technical requirements, ratings for CEADS – Ratings of the
CEADS . 53
Table 5 – Summary of technical requirements, ratings for CEADS – Design and
construction of the CEADS . 55
– 6 – IEC 62271-212:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 212: Compact Equipment Assembly
for Distribution Substation (CEADS) for AC voltages up to 52 kV
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 62271-212 has been prepared by subcommittee 17C: Assemblies, of IEC technical
committee 17: High-voltage switchgear and controlgear. It is an International Standard.
This second edition cancels and replaces the first edition published in 2016. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clause numbering aligned with IEC 62271-1:2017,
b) rewording of title and scope of the document,
c) implement changes on internal arc definition and testing following the evolution of
prefabricated substation concept according to IEC 62271-202,
d) general review of main test procedures such as temperature rise or dielectric test on
interconnections, considering control equipment, communication, smart grid devices and
integration of components,
IEC 62271-212:2022 © IEC 2022 – 7 –
e) general review of installation, operation, safety and maintenance requirements.
The text of this International Standard is based on the following documents:
Draft Report on voting
17C/845/FDIS 17C/850/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
This International Standard should be read in conjunction with IEC 62271-1:2017, to which it
refers and which is applicable unless otherwise specified. In order to simplify the indication of
corresponding requirements, the same numbering of clauses and subclauses is used as in
IEC 62271-1:2017. Amendments to these clauses and subclauses are given under the same
numbering, whilst additional subclauses, are numbered from 101.
A list of all parts of the IEC 62271 series can be found, under the general title High-voltage
switchgear and controlgear, on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.
– 8 – IEC 62271-212:2022 © IEC 2022
INTRODUCTION
Traditionally a high-voltage/low-voltage distribution substation has been constructed by
installing the main electrical components –high-voltage switchgear and controlgear, power
transformer and the corresponding low-voltage switchgear and controlgear- within a closed
electrical operating area. It can be a room within a building intended for other usages (non
electrical uses) or a separated housing (prefabricated or not) designed specifically to contain
the electrical equipment of the substation or an open area limited by fences.
Some years ago in the search for a more standardized and compact substation, the concept of
prefabricated substation was developed. IEC 62271-202 covers this type of substation.
According to this document, the main electrical components (high-voltage switchgear and
controlgear, power transformer and low-voltage switchgear and controlgear) are fully in
compliance with their respective product standard, and the whole substation, including
interconnections and enclosure is designed and type tested and later manufactured and routine
tested in the factory. Correspondingly the quality of the substation is assured by the
manufacturer.
Moreover, also other types of assemblies have been introduced in the market. These are
assemblies comprising the main electrical active components of the substation and their
interconnections, delivered as a single product. The product can therefore be type tested,
manufactured, routine tested in the factory, transported and then installed in a closed electrical
operating area.
This type of factory assembled and type-tested product is covered by this document receiving
the generic name CEADS from Compact Equipment Assembly for Distribution Substation.
Numerous arrangements are possible and this document provides guidance on basic types of
assemblies, which might be envisaged.
A CEADS is not covered by IEC 61936-1. However, CEADS is intended to become part of a
distribution substation.
Taking into account the closer proximity of the main electrical components that even can share
some parts (enclosure, solid or fluid insulation…), it is very relevant to take notice of the
potential interaction between them. Therefore, to cover CEADS is neither sufficient nor always
applicable to refer to the relevant product standards. This document covers any additional
design and construction requirements and test methods applicable to the different types of
CEADS. In addition to the specified characteristics, particular attention has been paid to the
specification concerning the protection of persons, both operators and general public.
The CEADS is also of interest to committee TC 14: Power transformers, and committee TC 121:
Switchgear and controlgear and their assemblies for low voltage.
IEC 62271-212:2022 © IEC 2022 – 9 –
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 212: Compact Equipment Assembly
for Distribution Substation (CEADS) for AC voltages up to 52 kV
1 Scope
This part of IEC 62271 specifies the service conditions, rated characteristics, general structural
requirements and test methods of the assemblies of the main electrical functional units of a
high-voltage transformer substation, duly interconnected, for AC voltages up to and including
52 kV on the high-voltage side and service frequency 50 Hz or 60 Hz. The CEADS is
cable-connected to the high-voltage network for indoor and outdoor applications of restricted
access.
A CEADS as defined in this document is designed and tested to be a single product with a
single serial number and one set of documentation.
The functions of a CEADS are:
– high-voltage/high-voltage or high-voltage/low-voltage transformation;
and some or all the following:
– switching and control for the operation of the high-voltage circuit(s);
– switching and control for the operation of the low-voltage circuit(s);
– protection of the power transformer functional unit.
The main functions are integrated in the following functional units:
– high-voltage functional unit;
– power transformer functional unit;
– low-voltage functional unit.
NOTE For the purpose of this document a self-protected transformer is not considered as a CEADS, but as a
functional unit, designed and type tested to its own product standard IEC 60076-13:2006.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60050-441, International Electrotechnical Vocabulary (IEV) – Part 441: Switchgear,
controlgear and fuses (available at www.electropedia.org)
IEC 60050-461, International Electrotechnical Vocabulary (IEV) – Part 461: Electric cables
(available at www.electropedia.org)
IEC 60076 (all parts), Power transformers
IEC 60076-1:2011, Power transformers – Part 1: General
– 10 – IEC 62271-212:2022 © IEC 2022
IEC 60076-2:2011, Power transformers – Part 2: Temperature rise for liquid-immersed
transformers
IEC 60076-3:2013, Power transformers – Part 3: Insulation levels, dielectric tests and external
clearances in air
IEC 60076-3:2013/AMD1:2018
IEC 60076-5:2006, Power transformers – Part 5: Ability to withstand short circuit
IEC 60076-7:2018, Power transformers – Part 7: Loading guide for mineral-oil-immersed power
transformers
IEC 60076-10:2016, Power transformers – Part 10: Determination of sound levels
IEC 60076-11:2018, Power transformers – Part 11: Dry-type transformers
IEC 60076-12:2008, Power transformers – Part 12: Loading guide for dry-type power
transformers
IEC 60076-15:2015, Power transformers – Part 15: Gas-filled power transformers
IEC 60243-1:2013, Electrical strength of insulating materials – Test methods – Part 1: Tests at
power frequencies
IEC 60364-4-41:2005, Low-voltage electrical installations – Part 4-41: Protection for safety –
Protection against electric shock
IEC 60364-4-41:2005/AMD1:2017
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code
...
SLOVENSKI STANDARD
01-oktober-2022
Nadomešča:
SIST EN 62271-212:2017
Visokonapetostne stikalne in krmilne naprave - 212. del: Kompaktni sestavi
opreme za distribucijske postaje (CEADS) za napetosti AC do 52 kV (IEC 62271-
212:2022)
High-voltage switchgear and controlgear - Part 212: Compact Equipment Assembly for
Distribution Substation (CEADS) for AC voltages up to 52 kV (IEC 62271-212:2022)
Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 212: Kompakte
Gerätekombinationen für Verteilstationen (CEADS) (IEC 62271-212:2022)
Appareillage à haute tension - Partie 212: Ensemble compact d’équipement pour poste
de distribution (ECEPD) pour les tensions alternatives inférieures ou égales à 52 kV (IEC
62271-212:2022)
Ta slovenski standard je istoveten z: EN IEC 62271-212:2022
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 62271-212
NORME EUROPÉENNE
EUROPÄISCHE NORM August 2022
ICS 29.130.10 Supersedes EN 62271-212:2017
English Version
High-voltage switchgear and controlgear - Part 212: Compact
Equipment Assembly for Distribution Substation (CEADS) for AC
voltages up to 52 kV
(IEC 62271-212:2022)
Appareillage à haute tension - Partie 212: Ensemble Hochspannungs-Schaltgeräte und -Schaltanlagen -
compact d'équipement pour poste de distribution (ECEPD) Teil 212: Kompakte Gerätekombinationen für
pour les tensions alternatives inférieures ou égales à 52 kV Verteilstationen (CEADS)
(IEC 62271-212:2022) (IEC 62271-212:2022)
This European Standard was approved by CENELEC on 2022-08-03. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62271-212:2022 E
European foreword
The text of document 17C/845/FDIS, future edition 2 of IEC 62271-212, prepared by SC 17C
"Assemblies" of IEC/TC 17 "High-voltage switchgear and controlgear" was submitted to the IEC-
CENELEC parallel vote and approved by CENELEC as EN IEC 62271-212:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-05-03
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-08-03
document have to be withdrawn
This document supersedes EN 62271-212:2017 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62271-212:2022 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60059:1999 NOTE Harmonized as EN 60059:1999 (not modified)
IEC 62271-4:2013 NOTE Harmonized as EN 62271-4:2013 (not modified)
IEC 61936-1:2021 NOTE Harmonized as EN IEC 61936-1:2021 (not modified)
IEC 62262:2002 NOTE Harmonized as EN 62262:2002 (not modified)
IEC/TR 62271-307:2015 NOTE Harmonized as CLC IEC/TR 62271-307:2019 (not modified)
IEC 60076-13:2006 NOTE Harmonized as EN 60076-13:2006 (not modified)
IEC/TR 62271-208:2009 NOTE Harmonized as CLC/TR 62271-208:2010 (not modified)
IEC 62271-200:2011 NOTE Harmonized as EN 62271-200:2012 (not modified)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-441 - International Electrotechnical Vocabulary. - -
Switchgear, controlgear and fuses
IEC 60050-461 - International Electrotechnical Vocabulary - - -
Part 461: Electric cables
IEC 60076 series Power transformers EN 60076 series
IEC 60076-1 2011 Power transformers - Part 1: General EN 60076-1 2011
IEC 60076-2 2011 Power transformers - Part 2: Temperature EN 60076-2 2011
rise for liquid-immersed transformers
IEC 60076-3 2013 Power transformers - Part 3: Insulation EN 60076-3 2013
levels, dielectric tests and external
clearances in air
+ A1 2018 + A1 2018
IEC 60076-5 2006 Power transformers - Part 5: Ability to EN 60076-5 2006
withstand short circuit
IEC 60076-7 2018 Power transformers - Part 7: Loading guide - -
for mineral-oil-immersed power
transformers
IEC 60076-10 2016 Power transformers - Part 10: EN 60076-10 2016
Determination of sound levels
IEC 60076-11 2018 Power transformers - Part 11: Dry-type EN IEC 60076-11 2018
transformers
IEC 60076-12 2008 Power transformers - Part 12: Loading - -
guide for dry-type power transformers
IEC 60076-15 2015 Power transformers - Part 15: Gas-filled - -
power transformers
IEC 60243-1 2013 Electric strength of insulating materials - EN 60243-1 2013
Test methods - Part 1: Tests at power
frequencies
Publication Year Title EN/HD Year
IEC 60364-4-41 2005 Low-voltage electrical installations -
(mod) Part 4-41: Protection for safety - Protection
against electric shock
+ A1 2017 HD 60364-4-41 2017
- - + A11 2017
- - + A12 2019
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code)
- - + corrigendum May 1993
+ A1 1999 + A1 2000
+ A2 2013 + A2 2013
IEC 60721-1 1990 Classification of environmental conditions - EN 60721-1 1995
Part 1: Environmental parameters and their
severities
+ A1 1992 - -
+ A2 1995 + A2 1995
IEC 60721-2-2 2012 Classification of environmental conditions - EN 60721-2-2 2013
Part 2-2: Environmental conditions
appearing in nature - Precipitation and
wind
IEC 60721-2-4 2018 Classification of environmental conditions - EN IEC 60721-2-4 2018
Part 2-4: Environmental conditions
appearing in nature - Solar radiation and
temperature
- - + AC 2018-
IEC/TS 60815 series Selection and dimensioning of high-voltage - series
insulators intended for use in polluted
conditions
IEC 60947-1 2020 Low-voltage switchgear and controlgear - EN IEC 60947-1 2021
Part 1: General rules
IEC 61439 series Low-voltage switchgear and controlgear EN IEC 61439 series
assemblies
IEC 61439-1 2020 Low-voltage switchgear and controlgear EN IEC 61439-1 2021
assemblies - Part 1: General rules
IEC 62271-1 2017 High-voltage switchgear and controlgear - EN 62271-1 2017
Part 1: Common specifications for
alternating current switchgear and
controlgear
IEC 62271-200 2021 High-voltage switchgear and controlgear - EN IEC 62271-200 2021
Part 200: AC metal-enclosed switchgear
and controlgear for rated voltages above 1
kV and up to and including 52 kV
This series supersedes some parts of IEC 60439 series.
Publication Year Title EN/HD Year
IEC 62271-201 2014 High-voltage switchgear and controlgear - EN 62271-201 2014
Part 201: AC solid-insulation enclosed
switchgear and controlgear for rated
voltages above 1 kV and up to and
including 52 kV
IEC 62271-202 2022 High-voltage switchgear and controlgear - - -
Part 202: AC prefabricated substations for
rated voltages above 1 kV and up to and
including 52 kV
IEC 62271-212 ®
Edition 2.0 2022-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
High-voltage switchgear and controlgear –
Part 212: Compact Equipment Assembly for Distribution Substation (CEADS) for
AC voltages up to 52 kV
Appareillage à haute tension –
Partie 212: Ensemble compact d’équipement pour poste de distribution
(ECEPD) pour les tensions alternatives inférieures ou égales à 52 kV
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.10 ISBN 978-2-8322-3806-6
– 2 – IEC 62271-212:2022 © IEC 2022
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 11
3.1 General terms and definitions . 11
3.2 Assemblies of switchgear and controlgear . 11
3.3 Parts of assemblies . 12
3.4 Switching devices . 13
3.5 Parts of switchgear and controlgear . 13
3.6 Operational characteristics of switchgear and controlgear . 13
3.7 Characteristic quantities . 13
3.8 Index of definitions . 13
4 Normal and special service conditions . 13
4.1 Normal service conditions . 13
4.2 Special service conditions . 14
5 Ratings . 15
5.1 General . 15
5.2 Rated voltage . 16
5.3 Rated insulation level . 16
5.4 Rated frequency (f ) . 16
r
5.5 Rated continuous current (I ) . 16
r
5.6 Rated short-time withstand current (I ) . 17
k
5.7 Rated peak withstand current (I ) . 17
p
5.9 Rated supply voltage of auxiliary and control circuits (U ) . 18
a
5.10 Rated supply frequency of auxiliary and control circuits . 18
5.11 Rated pressure of compressed gas supply for controlled pressure systems . 18
5.101 Rated power and total losses of CEADS . 19
5.102 Ratings of the internal arc classification (IAC) . 19
6 Design and construction . 20
6.1 Requirements for liquids in switchgear and controlgear . 21
6.2 Requirements for gases in switchgear and controlgear . 21
6.3 Earthing of switchgear and controlgear . 21
6.4 Auxiliary and control equipment and circuits . 22
6.5 Dependent power operation . 22
6.6 Stored energy operation . 22
6.7 Independent unlatched operation (independent manual or power operation) . 22
6.8 Manually operated actuators . 22
6.9 Operation of releases . 22
6.10 Pressure/level indication . 22
6.11 Nameplates. 22
6.12 Locking devices . 23
6.13 Position indication . 23
6.14 Degrees of protection provided by enclosures . 23
6.15 Creepage distances for outdoor insulators . 24
IEC 62271-212:2022 © IEC 2022 – 3 –
6.16 Gas and vacuum tightness . 24
6.17 Tightness for liquid systems . 24
6.18 Fire hazard (flammability) . 24
6.19 Electromagnetic compatibility (EMC) . 24
6.20 X-ray emission . 24
6.21 Corrosion . 24
6.22 Filling levels for insulation, switching and/or operation . 24
6.101 Protection against mechanical stresses . 25
6.102 Protection of the environment due to internal defects . 25
6.103 Internal arc fault . 25
6.104 Enclosures . 26
6.105 Sound emission . 26
6.106 Electromagnetic fields . 26
6.107 Solar radiation . 26
7 Type tests . 27
7.1 General . 27
7.2 Dielectric tests . 28
7.3 Radio interference voltage (RIV) test . 32
7.4 Resistance measurement . 32
7.5 Continuous current tests . 32
7.6 Short-time withstand current and peak withstand current tests . 32
7.7 Verification of the protection . 33
7.8 Tightness tests . 33
7.9 Electromagnetic compatibility tests (EMC) . 33
7.10 Additional tests on auxiliary and control circuits . 34
7.11 X-radiation test for vacuum interrupters . 34
7.101 Temperature-rise tests . 35
7.102 Internal arc test . 42
7.103 Verification of making and breaking capacities of high-voltage functional unit . 45
7.104 Mechanical operation tests . 45
7.105 Mechanical stability test . 45
7.106 Pressure withstand test for gas-filled compartments. 45
7.107 Measurements of leakage currents of non-metallic enclosures . 46
7.108 Weatherproofing test . 46
7.109 Tightness and mechanical strength for liquid filled compartments . 46
7.110 Measurement or calculation of electromagnetic fields . 46
8 Routine tests . 46
8.1 General . 46
8.2 Dielectric tests on the main circuit . 47
8.3 Tests on auxiliary and control circuits . 48
8.4 Measurement of the resistance of the main circuit . 48
8.5 Tightness test . 48
8.6 Design and visual checks . 48
8.101 Mechanical operation tests on high-voltage functional unit . 48
8.102 Pressure tests of gas-filled compartments . 48
8.103 Tests of auxiliary electrical, pneumatic and hydraulic devices . 49
8.104 Measurement of the winding resistance . 49
8.105 Measurement of the voltage ratio and check of phase displacement . 49
8.106 Measurement of the short circuit impedance and load losses . 49
– 4 – IEC 62271-212:2022 © IEC 2022
8.107 Measurement of no-load loss and current . 49
8.108 Inspection of the low-voltage functional unit, including inspection of wiring,
operational performance and function . 49
8.109 Checking of protective measures and of the electrical continuity of the
protective circuits of the low-voltage functional unit . 49
8.110 Tests after CEADS assembly on site . 49
9 Guide to the selection of CEADS (informative) . 49
9.1 General . 49
9.2 Selection of rated values . 50
9.3 Cable-interface considerations . 50
9.4 Continuous or temporary overload due to changed service conditions . 50
9.5 Environmental aspects . 50
9.101 Selection of internal arc classification . 50
9.102 Summary of technical requirements and ratings for CEADS . 52
10 Information to be given with enquiries, tenders and orders (informative) . 56
10.1 General . 56
10.2 Information with enquiries and orders . 56
10.3 Information with tenders . 57
11 Transport, storage, installation, operating instructions and maintenance. 58
11.1 General . 58
11.2 Conditions during transport, storage and installation . 58
11.3 Installation . 58
11.4 Operating instructions . 59
11.5 Maintenance . 60
11.101 Dismantling, recycling and disposal at the end of service life . 60
12 Safety . 60
12.1 General . 60
12.101 Electrical aspects . 61
12.102 Mechanical aspects . 61
12.103 Thermal aspects . 61
12.104 Internal arc aspects . 61
13 Influence of the product on the environment . 61
Annex A (normative) Method for testing CEADS under conditions of arcing due to an
internal arc fault . 62
A.1 General . 62
A.2 Room simulation . 62
A.3 Indicators (for assessing the thermal effects of the gases) . 62
A.4 Tolerances for geometrical dimensions of test arrangements . 64
A.5 Test parameters . 64
A.6 Test procedure . 64
A.7 Designation of the internal arc classification . 66
Annex B (normative) Test to verify the sound level of a CEADS . 75
B.1 Purpose . 75
B.2 Test object . 75
B.3 Test method . 75
B.4 Measurements . 75
B.5 Presentation and calculation of the results . 75
Annex C (informative) Types and application of CEADS . 76
IEC 62271-212:2022 © IEC 2022 – 5 –
C.1 Type of CEADS . 76
C.2 Application of CEADS . 76
Bibliography . 79
Figure 1 – Test diagram in case of type-tested high-voltage functional unit . 37
Figure 2 – Test diagram in case of non-type-tested high-voltage functional unit . 38
Figure 3 – Diagram of the temperature-rise test alternative method . 39
Figure 4 – Diagram for the open-circuit test . 40
Figure A.1 – Mounting frame for vertical indicators . 67
Figure A.2 – Horizontal indicators . 67
Figure A.3 – Protection of operators in front of classified side(s) of CEADS . 68
Figure A.4 – Protection of general public around the CEADS . 68
Figure A.5 – Protection of operators in front of classified side(s) of CEADS having a
pressure relief volume below the floor . 69
Figure A.6 – Protection of the general public around the CEADS having a pressure
relief volume below the floor . 70
Figure A.7 – Selection of tests on high-voltage functional unit for class IAC-A . 71
Figure A.8 – Selection of tests on high-voltage functional unit for class IAC-B . 72
Figure A.9 – Selection of tests on high-voltage interconnection for class IAC-A . 73
Figure A.10 – Selection of tests on high-voltage interconnection for class IAC-B . 74
Figure C.1 – Application of CEADS . 77
Figure C.2 – CEADS Type G . 77
Figure C.3 – CEADS Type A . 78
Figure C.4 – CEADS Type I . 78
Table 1 – Locations, causes and examples of measures decreasing the probability of
internal arc faults . 51
Table 2 – Examples of measures limiting the consequences of internal arc faults . 51
Table 3 – Summary of technical requirements, ratings for CEADS – Service conditions . 53
Table 4 – Summary of technical requirements, ratings for CEADS – Ratings of the
CEADS . 53
Table 5 – Summary of technical requirements, ratings for CEADS – Design and
construction of the CEADS . 55
– 6 – IEC 62271-212:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 212: Compact Equipment Assembly
for Distribution Substation (CEADS) for AC voltages up to 52 kV
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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consensus of opinion on the relevant subjects since each technical committee has representation from all
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 62271-212 has been prepared by subcommittee 17C: Assemblies, of IEC technical
committee 17: High-voltage switchgear and controlgear. It is an International Standard.
This second edition cancels and replaces the first edition published in 2016. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clause numbering aligned with IEC 62271-1:2017,
b) rewording of title and scope of the document,
c) implement changes on internal arc definition and testing following the evolution of
prefabricated substation concept according to IEC 62271-202,
d) general review of main test procedures such as temperature rise or dielectric test on
interconnections, considering control equipment, communication, smart grid devices and
integration of components,
IEC 62271-212:2022 © IEC 2022 – 7 –
e) general review of installation, operation, safety and maintenance requirements.
The text of this International Standard is based on the following documents:
Draft Report on voting
17C/845/FDIS 17C/850/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
This International Standard should be read in conjunction with IEC 62271-1:2017, to which it
refers and which is applicable unless otherwise specified. In order to simplify the indication of
corresponding requirements, the same numbering of clauses and subclauses is used as in
IEC 62271-1:2017. Amendments to these clauses and subclauses are given under the same
numbering, whilst additional subclauses, are numbered from 101.
A list of all parts of the IEC 62271 series can be found, under the general title High-voltage
switchgear and controlgear, on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.
– 8 – IEC 62271-212:2022 © IEC 2022
INTRODUCTION
Traditionally a high-voltage/low-voltage distribution substation has been constructed by
installing the main electrical components –high-voltage switchgear and controlgear, power
transformer and the corresponding low-voltage switchgear and controlgear- within a closed
electrical operating area. It can be a room within a building intended for other usages (non
electrical uses) or a separated housing (prefabricated or not) designed specifically to contain
the electrical equipment of the substation or an open area limited by fences.
Some years ago in the search for a more standardized and compact substation, the concept of
prefabricated substation was developed. IEC 62271-202 covers this type of substation.
According to this document, the main electrical components (high-voltage switchgear and
controlgear, power transformer and low-voltage switchgear and controlgear) are fully in
compliance with their respective product standard, and the whole substation, including
interconnections and enclosure is designed and type tested and later manufactured and routine
tested in the factory. Correspondingly the quality of the substation is assured by the
manufacturer.
Moreover, also other types of assemblies have been introduced in the market. These are
assemblies comprising the main electrical active components of the substation and their
interconnections, delivered as a single product. The product can therefore be type tested,
manufactured, routine tested in the factory, transported and then installed in a closed electrical
operating area.
This type of factory assembled and type-tested product is covered by this document receiving
the generic name CEADS from Compact Equipment Assembly for Distribution Substation.
Numerous arrangements are possible and this document provides guidance on basic types of
assemblies, which might be envisaged.
A CEADS is not covered by IEC 61936-1. However, CEADS is intended to become part of a
distribution substation.
Taking into account the closer proximity of the main electrical components that even can share
some parts (enclosure, solid or fluid insulation…), it is very relevant to take notice of the
potential interaction between them. Therefore, to cover CEADS is neither sufficient nor always
applicable to refer to the relevant product standards. This document covers any additional
design and construction requirements and test methods applicable to the different types of
CEADS. In addition to the specified characteristics, particular attention has been paid to the
specification concerning the protection of persons, both operators and general public.
The CEADS is also of interest to committee TC 14: Power transformers, and committee TC 121:
Switchgear and controlgear and their assemblies for low voltage.
IEC 62271-212:2022 © IEC 2022 – 9 –
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 212: Compact Equipment Assembly
for Distribution Substation (CEADS) for AC voltages up to 52 kV
1 Scope
This part of IEC 62271 specifies the service conditions, rated characteristics, general structural
requirements and test methods of the assemblies of the main electrical functional units of a
high-voltage transformer substation, duly interconnected, for AC voltages up to and including
52 kV on the high-voltage side and service frequency 50 Hz or 60 Hz. The CEADS is
cable-connected to the high-voltage network for indoor and outdoor applications of restricted
access.
A CEADS as defined in this document is designed and tested to be a single product with a
single serial number and one set of documentation.
The functions of a CEADS are:
– high-voltage/high-voltage or high-voltage/low-voltage transformation;
and some or all the following:
– switching and control for the operation of the high-voltage circuit(s);
– switching and control for the operation of the low-voltage circuit(s);
– protection of the power transformer functional unit.
The main functions are integrated in the following functional units:
– high-voltage functional unit;
– power transformer functional unit;
– low-voltage functional unit.
NOTE For the purpose of this document a self-protected transformer is not considered as a CEADS, but as a
functional unit, designed and type tested to its own product standard IEC 60076-13:2006.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60050-441, International Electrotechnical Vocabulary (IEV) – Part 441: Switchgear,
controlgear and fuses (available at www.electropedia.org)
IEC 60050-461, International Electrotechnical Vocabulary (IEV) – Part 461: Electric cables
(available at www.electropedia.org)
IEC 60076 (all parts), Power transformers
IEC 60076-1:2011, Power transformers – Part 1: General
– 10 – IEC 62271-212:2022 © IEC 2022
IEC 60076-2:2011, Power transformers – Part 2: Temperature rise for liquid-immersed
transformers
IEC 60076-3:2013, Power transformers – Part 3: Insulation levels, dielectric tests and external
clearances in air
IEC 60076-3:2013/AMD1:2018
IEC 60076-5:2006, Power transformers – Part 5: Ability to withstand short circuit
IEC 60076-7:2018, Power transformers – Part 7: Loading guide for mineral-oil-immersed power
transformers
IEC 60076-10:2016, Power transformers – Part 10: Determination of sound levels
IEC 60076-11:2018, Power transformers – Part 11: Dry-type transformers
IEC 60076-12:2008, Power transformers – Part 12: Loading guide for dry-type power
transformers
IEC 60076-15:2015, Power transformers – Part 15: Gas-filled power transformers
IEC 60243-1:2013, Electrical strength of insulating materials – Test methods – Part 1: Tests at
power frequencies
IEC 60364-4-41:2005, Low-voltage electrical installations – Part 4-41: Protection for safety –
Protection against electric shock
IEC 60364-4-41:2005/AMD1:2017
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
...
Frequently Asked Questions
SIST EN IEC 62271-212:2022 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "High-voltage switchgear and controlgear - Part 212: Compact Equipment Assembly for Distribution Substation (CEADS) for AC voltages up to 52 kV (IEC 62271-212:2022)". This standard covers: <!-- NEW! -->IEC 62271-212:2022 is available as <a href="https://webstore.iec.ch/publication/77114">IEC 62271-212:2022 RLV</a> which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.</br></br>IEC 62271-212;2022 specifies the service conditions, rated characteristics, general structural requirements and test methods of the assemblies of the main electrical functional units of a high-voltage transformer substation, duly interconnected, for AC voltages up to and including 52 kV on the high-voltage side and service frequency 50 Hz or 60 Hz. The CEADS is cable‑connected to the high-voltage network for indoor and outdoor applications of restricted access. This second edition cancels and replaces the first edition published in 2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - clause numbering aligned with IEC 62271-1:2017, - rewording of title and scope of the document, - implement changes on internal arc definition and testing following the evolution of prefabricated substation concept according to IEC 62271-202, - general review of main test procedures such as temperature rise or dielectric test on interconnections, considering control equipment, communication, smart grid devices and integration of components, - general review of installation, operation, safety and maintenance requirements.
<!-- NEW! -->IEC 62271-212:2022 is available as <a href="https://webstore.iec.ch/publication/77114">IEC 62271-212:2022 RLV</a> which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.</br></br>IEC 62271-212;2022 specifies the service conditions, rated characteristics, general structural requirements and test methods of the assemblies of the main electrical functional units of a high-voltage transformer substation, duly interconnected, for AC voltages up to and including 52 kV on the high-voltage side and service frequency 50 Hz or 60 Hz. The CEADS is cable‑connected to the high-voltage network for indoor and outdoor applications of restricted access. This second edition cancels and replaces the first edition published in 2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - clause numbering aligned with IEC 62271-1:2017, - rewording of title and scope of the document, - implement changes on internal arc definition and testing following the evolution of prefabricated substation concept according to IEC 62271-202, - general review of main test procedures such as temperature rise or dielectric test on interconnections, considering control equipment, communication, smart grid devices and integration of components, - general review of installation, operation, safety and maintenance requirements.
SIST EN IEC 62271-212:2022 is classified under the following ICS (International Classification for Standards) categories: 29.130.10 - High voltage switchgear and controlgear. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN IEC 62271-212:2022 has the following relationships with other standards: It is inter standard links to SIST EN 62271-212:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase SIST EN IEC 62271-212:2022 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
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